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Map of the coastline of the bay of Batavia (Jakarta) showing the extension of the port’s pier (in red, labelled CD), the sand and mud bank and bathymetry (sea depth) in the bay, and notes regarding changes in tide levels over the years.

Map of the Penang Strait, including written instructions on how to navigate the strait. On land, areas of cultivation are marked, with a table listing acreage used for each crop. A boundary with Siam based on an 1831 treaty is also shown.

Plan of improvements made to the pier at the port in Batavia (Jakarta): red lines show new parts added in 1822; numbers record the change in water depth (red is 1818; black is 1823). Planned future works and the ‘Waterkasteel’ fort are also shown.

Plan of improvements made to the pier at the port in Batavia (Jakarta): red lines show new parts added in 1822; numbers record the change in water depth (red is 1818; black is 1822). Planned future works and the ‘Waterkasteel’ fort are also shown.

A map to aid in the navigation of the rivers leading to Saigon (Ho Chi Minh City, Vietnam). Details include bathymetry (water depth), currents, and a side view (or ‘elevation’) of hills to use as a landmark. Tides are described in written remarks.